With some cheap parts, you can create those equipments for yourself. I especially like the camera track: Movie Making Equipment you can make easily at home – [Softweigh Multimedia] Using wheels at 45 degrees By mounting sets of wheels at an angle, they will not only run on a smooth surface but will also run perfectly on most types of tube too. Our simple to make PVC tube dolly uses inexpensive skateboard wheels to construct a dolly that will run on most tubes from 25mm up to 100mm and is simply and cheap to build too…
